Injector size

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Injector size

Postby maych87 » Fri May 12, 2017 9:10 am

I have a 1989 Porsche 911 with a 3.6 l. I am setting up the injector size in tuner studio. Porsche runs a much higher fuel pressure than 43.5 psi that most injectors are flow tested at. Do I use my injector flow rating at 43.5 psi or what they are rated at for my vehicles fuel pressure?


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Re: Injector size

Postby grom_e30 » Fri May 12, 2017 11:11 am

the flow rate they will be at in your install.
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Injector size

Postby maych87 » Fri Jun 09, 2017 11:11 pm

The manual says 55psi engine off pump running. And 48psi engine at idle. Which is the proper psi to use?


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Re: Injector size

Postby DaveEFI » Sat Jun 10, 2017 1:56 am

You use the higher one. That is the pressure at full throttle.
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